The libary needs at least 15 people to sign up for an event in order to run it correctly 3 people have signed up and the library expects 2 more people to sign up each day after how many days will the library be sure it can run the event write an inequality that could be used to solve this problem

Let "d" represent the number of days that have passed.

The library needs at least 15 people to sign up for the event.

3 people have already signed up.

The library expects 2 more people to sign up each day.

Therefore, the number of people who sign up after "d" days would be 3 + 2d.

To ensure that the library can run the event, the number of people who sign up after "d" days must be greater than or equal to 15.

Thus, the inequality that could be used to solve this problem is:

3 + 2d ≥ 15